CVE Watch—

CVE-2021-30116

Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability

CVSS

—

No CVSS

EPSS

85.6%

p100

KEV

YES

Nov 3, 2021

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

85.6%EPSS · 30 days85.6%

2026-06-302026-07-16

KEV catalog record

Product

Kaseya / Virtual System/Server Administrator (VSA)

Vulnerability

Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability

Added to KEV

Nov 3, 2021

Remediate by

Nov 17, 2021

Known ransomware use

Yes

Summary description

Kaseya Virtual System/Server Administrator (VSA) contains an information disclosure vulnerability allowing an attacker to obtain the sessionId that can be used to execute further attacks against the system.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-30116

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2017-18362—

99.7%

KEV—80Kaseya VSA SQL Injection Vulnerability—CVE-2018-20753—

98.0%

KEV—79Kaseya VSA Remote Code Execution Vulnerability—